Studying On The Parameters Of Bond-model In DEM For Asphalt Mixture

International Conference on Manufacturing Technology, Materials and Chemical Engineering

机械制造;材料科学;化学工业

Sheng, Feng^1 ; Hou, Lijun^1 ; Wang, Yuan^1 ; Li, Zhendong^1 ; Shan, Jingsong^2

Powerchina Rdbridge Group Co. LTD, Beijing

100048, China^1

Shandong Civil Engineering Disaster Prevention and Mitigation Key Laboratory, Shandong University of Science and Technology, Qingdao, SHANDONG

266590, China^2

关键词: Bond method;    Bond models;    Discrete element modeling;    Load-deformation curves;    Peak load;    Splitting tests;    Stiffness parameters;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/392/2/022004/pdf
DOI  :  10.1088/1757-899X/392/2/022004

学科分类：材料科学（综合）

来源: IOP

【 摘 要 】

The discrete element method used to simulate asphalt mixture's performance can fully consider the effect of interaction between particles, but the key to use discrete element method is to select reasonable parameters of contact constitutive model. Using 2D and 3D discrete element method to establish asphalt mixture splitting test model which adopting contact-bond method between particles, the influence of particle stiffness and bond strength on the simulation results are analyzed. It is found that the straight slope of the load-deformation curve is mainly determined by the stiffness parameter and the peak load is determined by the bond strength. Asphalt mixture laboratory splitting test of AC-20 and AC-13 at -10°C, 0°C, 10°C and 20°C are accomplished, then according to the load-deformation curve's initial slope and peak load, discrete element model parameters are determined. The relationship between load-deformation curve's initial straight slope and stiffness, peak load and bond strength are concluded on the basis of splitting test results curve.